- add netmap-libpcap

- add netmap (FreeBSD header files need to be updated with this)
- move prototype perl scripts to prototype/ folder
- create basic structure for sipcap app (no code yet)

netmap-libpcap/tests/pcap_compile_test.c

@@ -0,0 +1,11 @@
+   pcap = pcap_open_dead(link, snaplen); 
+   /* todo: hook together argv to a single string */ 
+   prog = argv[0]; 
+   if (pcap_compile(pcap, &p, prog, optimize, 0) < 0) { 
+      fprintf(stderr, pcap_geterr(pcap)); 
+      exit(1); 
+   } 
+   bpf_dump(&p, option); 
+   pcap_freecode(&p); 
+   pcap_close(pcap); 
+